penumbrousadj.
/pᵻˈnʌmbrəs/, /pɛˈnʌmbrəs/, U.S. /pəˈnəmbrəs/ = penumbral adj. 2.
ΘΚΠ
the world > matter > light > darkness or absence of light > intercepting or cutting off of light > [adjective] > casting a shadow > of or relating to or resembling a shadow > partial
penumbral1737
penumbrous1875
1875 W. Blasius Storms 322 This penumbrous shadow was well defined in its marginal lines, because it was dark, while the town..appeared white as chalk.
1887 Contemp. Rev. July 24 In the penumbrous dulness I discerned a mass of white rock leading to the higher level.
1959 Times 16 May 8/6 To proceed to some stygian cellar,..and from the penumbrous interior gathering them [sc. mushrooms] by the hundredweight, is not, of course, sport.
1964 Listener 19 Mar. 484/2 He's more readable than Grimm, and much more concerned to give a solid idea of those contradictory, penumbrous figures.
1997 M. Acton Learning to look at Paintings (2000) iv. 84 Certain areas are lit up starkly and the rest cast into varying degrees of penumbrous shade.
This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022).
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adj.1875